Make debounce() signal changes in the cooked matrix as return value (#17554)

1 files changed, 9 insertions, 5 deletions

diff --git a/quantum/debounce/sym_defer_pr.c b/quantum/debounce/sym_defer_pr.c
index ce24f0922f..452c4599d0 100644
--- a/quantum/debounce/sym_defer_pr.c
+++ b/quantum/debounce/sym_defer_pr.c
@@ -46,11 +46,12 @@ void debounce_free(void) {
     last_raw = NULL;
 }
 
-void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
-    uint16_t now       = timer_read();
-    uint16_t elapsed16 = TIMER_DIFF_16(now, last_time);
-    last_time          = now;
-    uint8_t elapsed    = (elapsed16 > 255) ? 255 : elapsed16;
+bool debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
+    uint16_t now           = timer_read();
+    uint16_t elapsed16     = TIMER_DIFF_16(now, last_time);
+    last_time              = now;
+    uint8_t elapsed        = (elapsed16 > 255) ? 255 : elapsed16;
+    bool    cooked_changed = false;
 
     uint8_t* countdown = countdowns;
 
@@ -63,10 +64,13 @@ void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool
         } else if (*countdown > elapsed) {
             *countdown -= elapsed;
         } else if (*countdown) {
+            cooked_changed |= cooked[row] ^ raw_row;
             cooked[row] = raw_row;
             *countdown  = 0;
         }
     }
+
+    return cooked_changed;
 }
 
 bool debounce_active(void) {